TDT

TDT may refer to:

• TDT is in various languages (Spanish, Portuguese, Italian, Catalan and Galician) for Digital terrestrial television.
• TDT (TV station), a digital television station in Tasmania, Australia
• TDT (Portugal), digital terrestrial television in Portugal
• TDT (Spain), digital terrestrial television in Spain
• Terminal deoxynucleotidyl transferase, a specialized DNA polymerase expressed in immune cells
• Terrestrial Dynamical Time, an obsolete name for Terrestrial Time
• The Damned Things, a heavy metal supergroup
• Time domain transmissometry, a method of testing transmission lines
• Toronto Dance Theatre, a Canadian modern dance company based in Toronto, Ontario
• Transmission disequilibrium test, a family-based genetic association test
• TDT Banda, Thamar Dillon Thomas Banda, a politician in Nyasaland in the years prior to independence
• TDT Band (The Down Troddence) is a six piece Thrash metal Band, originally from Kannur,Kerala,India